<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>pattern</title>
	</head>
	<body>
		<form  method="post">
			<input type="text" name="" id="" value="" required  pattern="^\w.*$"/>
			<input type="submit" name="" id=""  />
		</form>
		
	</body>
</html>
